That thermal curve matters when you're packing breakers into a closed enclosure; the 17.3 W maximum power loss adds up across multiple poles. Three-pole construction, rated insulation voltage 800 V. The interrupting capacity is the headline here: 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and still 17 kA at 690 V.
The two HQ auxiliary switches provide status feedback (open/closed/tripped) back to the control system. Dimensions: 130 mm height, 76.2 mm width (3 inches), 70 mm depth. No trip indicator window on this variant.
The 70 mm depth leaves room for rear-connected busbars and cable ducting behind the breaker — no need to oversize the enclosure for this unit alone.